L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 252

• Manufacturer Part Number: L-ET4148-50C-DB
• Manufacturer: LSI

Specifications of L-ET4148-50C-DB

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ET4148-50
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet
Appendix A: Registers
Tx_Length_Histogram
252
Table 353. Tx_Length_Histogram Field Parameters (continued)
Statistics counters roll over from their maximum count to zero without warning or indication that a rollover has
occurred. It is expected that the supervisor sample these counters often and use the delta from a previous sample
to the current sample to determine the overall count delta. If the current sample has a smaller value than the previ-
ous sample (indicating a rollover), then 2
delta to determine the actual delta. All statistics counters’ widths are scaled to allow for sampling by the supervisor
ten times per second without risk of missing a rollover event.
tx_256_511_byte_packets[21:0]
tx_512_1023_byte_packets[21:0]
tx_1024_1518_byte_packets[21:0]
tx_1519_1522_byte_packets[21:0]
tx_jumbo_packets[21:0]
Field Name
REFERENCE
(continued)
(continued)
PORT
XG1
Figure 265. Port Numbering Scheme
49
n
XG0
(where n is the number of bits in the statistics counter) is added to the
48
Agere Systems - Proprietary
Instances = 50
Instances = 50
Instances = 50
Instances = 50
Instances = 50
G47
Offset = 12.10
Offset = 16.10
Offset = 20.10
Offset = 24.10
Offset = 28.10
47
Spacing = 32
Spacing = 32
Spacing = 32
Spacing = 32
Spacing = 32
Mode = R/W
Mode = R/W
Mode = R/W
Mode = R/W
Mode = R/W
Parameters
G46
46
G = 10/100/1000 Mbits/s PORT
XG = 10 Gbits/s PORT
SU = SUPERVISOR
G45
PORT NUMBERING SCHEME
45
G44
44
Packets of all types transmitted without errors
whose overall length is from 256 to 511 bytes.
Packets of all types transmitted without errors
whose overall length is from 512 to 1,023 bytes.
Packets of all types transmitted without errors
whose overall length is from 1,024 to
1,518 bytes.
Packets of all types transmitted without errors
whose overall length is from 1,519 to
1,522 bytes.
Packets of all types transmitted without errors
whose overall length is greater than
1,522 bytes.
G3
3
G2
2
G1
Description
1
Preliminary Data Sheet
G0
0
Agere Systems Inc.
April 2006